Hybridization Between South American Jarilla and North American Diploid Creosotebush (Larrea, Zygophyllaceae)

T.W. YANG, TUCSON, J.H. HUNZIKER, L. POGGIO AND C.A. NARANJO

PLANT SYSTEMATICS AND EVOLUTION

SPRINGER WIEN

Lugar: Jena; Año: 1977 vol. 126 p. 331 - 346

0378-2697

Different strains of the two diploid Larrea species L. divaricata (S. America) and L. tridentata (N. America), are compared morphologically, cytologically, and in their seed proteins. There are minor differences, also in chiasma frequencies. Experimental F1 hybrids have near-normal meiosis but are semisterile. The parental species, therefore, biologically may be considered "allopatric semispecies".